I downloaded the Campaign yesterday, and since my Savegames were lost in a strange incident involving my brother and a kitten (seriously), I decided to play it right from the beginning.
However, when I try to load the fifth mission of FH 2259, I get three new errors that hadn't been there in the 2260 pack:
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1.
Error: Invalid subsystem name.
In sexpression: ( when 
   ( has-arrived-delay 3 "DF E' Lias" ) 
   ( send-message-list 
      "#Alpha 4, Cobra" 
      "High" 
      "Drazi attack1" 
      1500 
      "#Alpha 2, Phantom" 
      "High" 
      "Drazi attack2" 
      5500 
      "#Big Cash" 
      "High" 
      "Drazi attack3" 
      6000 
      "#Alpha 2, Phantom" 
      "High" 
      "Drazi attack4" 
      10000 
   )
   ( when 
      ( skill-level-at-least "Medium" ) 
      ( repair-subsystem 
         "DF E' Lias" 
         "turret06a" 
         101 
      )
      ( repair-subsystem 
         "DF E' Lias" 
         "turret05a" 
         101 
      )
      ( repair-subsystem 
         "DF Ha' Rtz" 
         "turret06a" 
         101 
      )
      ( repair-subsystem 
         "DF Ha' Rtz" 
         "turret05a" 
         101 
      )
   )
   ( cap-waypoint-speed "DF Pandora" 15 ) 
)
(Error appears to be: turret06a)
File: MissionParse.cpp
Line: 6096
Call stack:
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2.
Error: Invalid subsystem name.
In sexpression: ( when 
   ( has-arrived-delay 7 "DF Vdmster" ) 
   ( send-message 
      "#Alpha 4, Cobra" 
      "High" 
      "more Drazi" 
   )
   ( when 
      ( skill-level-at-least "Medium" ) 
      ( repair-subsystem 
         "DF Vdmster" 
         "turret06a" 
         101 
      )
      ( repair-subsystem 
         "DF Vdmster" 
         "turret05a" 
         101 
      )
   )
)
(Error appears to be: turret06a)
File: MissionParse.cpp
Line: 6096
Call stack:
------------------------------------------------------------------
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3.
Error: Invalid subsystem name.
In sexpression: ( when 
   ( is-subsystem-destroyed-delay 
      "DF E' Lias" 
      "reactor01" 
      0 
   )
   ( self-destruct "DF E' Lias" ) 
   ( when 
      ( = [] 0 ) 
      ( send-message 
         "#Alpha 2, Phantom" 
         "High" 
         "reactor" 
      )
   )
   ( modify-variable [] 1 ) 
)
(Error appears to be: reactor01)
File: MissionParse.cpp
Line: 6096
Call stack:
------------------------------------------------------------------
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It seems to be an issue with the subsystems, but I have no idea what may be causing this.
I'm using Zathras and all tables seem to be fine.